Microsoft is releasing a free add-on that could make life easier for teachers, professors, and others who use the online educational system Moodle.

The plug-in, which works with Office 2003 and Office 2007, allows users to save Word, Excel and PowerPoint documents directly to the open source online service. It also allows users to edit directly in Office a document saved on Moodle, which is widely used in colleges and at some K-12 schools as well.

"We know that it's out there in force," Jon Perera, general manager of Microsoft's Educational Products Group, said of Moodle. "It became a really logical and thoughtful step to make those two systems work better."

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